Combustible preparing device



Feb. 13, 1945.y G. B. clsP COMBUSTIBLE PREPARING DEVICE Filed May 27,1942 INVENTOR. BY George Bui C'Vip- Patented F eb.. 1 3, *1945 UNITEDSTATES PATENT OFFICEl COMBUSTIBLE PREPARING DEVICE George B. Crisp,Brooklyn, N. Y. Application May 27, 194.2., Serial No. 424.473'7v 3Claims.

This invention relates to combustible preparing devices, and is relatedparticularly to such devices for preparing combustible mixtures of fueloil and air for suchpurposes as use as the explosive mixture in internalcombustion engines, as the combustible mixture for furnaces, and as thecombustible mixture for other mechanisms requiring the same.

Numerous efforts'have heretofore been made to utilize fuel oil as thefuel for internal combustion engines primarily designed for use withhydrocarbons, particularly gasoline, of a more volatile character. Theprincipal difficulties encountered have their inception in theunsuccessful or imperfect atomization of the fuel, and the results havebeen slow or uncertain starting of the engine, high carbon deposit,development of excessive carbon monoxide, inefficiency and otherdeficiencies.

An object of the present invention is-to overcome the above-enumeratedand other difficulties.

A further object of the invention is to obtain maximum atomization ofand maximum power from the fuel.

Another object of the invention is to minimize temperature conditions inits effect upon atomization of the fuel.

Yet another object of the invention is to take care of condensate andavoid its beingforcedinto the engine manifold or engine. o Still furtherobjects of the invention will appear to those skilled in the art as thedescription progresses, both by direct statement thereof and byimplication from the context.

Referring to the accompanying drawing in which like numerals ofreference indicate similar parts throughout the several views;

Figure 1 is a sectional elevation of a preferred embodiment of the'invention; and

Figure 2 is a longitudinal section of the bank of centrifugal vanesshown in elevation inl Fig. 1, and on a scale increased over that ofFig. 1.

In the specific embodiment of the invention illustrated in said drawing,the reference numeral I designates a casing body portion of the mixingand discharge part of the device, said casing body portion beingcomposed of a plurality of sections for convenience of fabrication. Atthe fuel inlet end of this casing, boltedat the end thereof coaxialtherewith, is an electric or other motor II having a hollow shaft I2therethrough and protruding from both ends of the motor. Within thecasing body and mounted upon the end of the shaft protruding thereintoare a pluor outer end of the shaft I2 is coupling means for effectingappropriate fuel-conveying transfer to the rotating shaft from anon-rotating feedline. Said feed-line includes a valve Ill4 forregulating the fuel supply permitted to pass to the hollow shaft andvanes.

Said casing body portion IU, in proximity to the vanes, but not in thecentrifugal path from the edges thereof, provides an air inlet I5. Thisinlet is shown rearwardly of the vanes and substantially at the end ofthe casing nearest the motor.v ,Suitable` butterfly or other regulatingvalve I6 is utilized to control the quantity of air admitted. 'Beyondthe vanes, the casing is suitably shaped and constructed for conveyingthe mixed fuel and air to the manifold of an engine (not shown)Continuing the general reference to the disclosure, it may be furthersaid that operation of the device contemplates continuous andsubstantially constant-speed operation of motor Il and utilization of'Athe said hollow shaft` I2 as the armature shaft thereof. Fuel, suchasfuel oil of suitable grade,v is "introduced in regulated amountsthrough valve I4, shaft I2 and thence through lateral openings I1 ontothe inwardly directed surfaces of the vanes I3. By virtue of the vanesiiaring toward their free edges in conjunction with the high speed ofrotation thereof imparted by the motor Il, the fuel oil spreads into afilm and the film becomes thinner toward the edges of the vanes byvirtue of the surface dimensional increase resulting from the geometryof the said vanes. Finally, the rariled film reaching the edges of thevanes is centrifugally and violently expelled in a direction outwardlyin a highly atomized condition.

Normal suction of the engine draws air into the casing body through airinlet; I5 behind the atomized fuel which isthereby both mixed with theair very .thoroughly and carried by it to the engine with the mixture ina highly explosive state. Regulation of the proportions of air and fuelenable full utilization of the potential explosive power of the fuel andminimum condensation in transit and formation of minimum carbon monoxideand carbon in the engine.

As will be understood by those skilled in the art, the valve crank 48 onthe air-inlet butterfly and a crank on the fuel'inlet valve I4 may belinked together for maintaining proper proportion of fuel and air. y

The atomizing and air mixing portion of the device includes theheretofore mentionedbank of yrality of centrifugal vanes I 3. At theopposite vanes I3 within body portion I0. Said vanes are preferablyindividually formed, providing each a hub portion and a flaring portionwith the vanes partially nested but with space for oil film and escapeprovided between the overlapping flaring portions. A stud or other means49 extending axially through the hub portions of the vanes to the firstor larger one is threaded into that one thereby clamping all ofthe Vanesin a bank. The inner or larger one of the vanes has its hubappropriately socketed and threaded and screwed onto the end of .themotor shaft'. From its end next the shaft said stud is longitudinallyprovided with a duct 50 as far as the stud head. A

plurality of radial ducts l1 are provided fromy the longitudinal duct tothe several spaces between thearing Vane's.

In use, the motor turns continuouslyand therefore centrifugal action iscontinuously operative upon the fuel oil in the longitudinalduct of the56, the upper end of which helps to form said trough 53, is provided atthe extreme outlet end, the` same being appropriately flanged forattachment to the engine manifold or for other purpose as may be founddesirable. A throttling butterfly valve 51 is situated in this neck forl governing the outflow of the mixture, and if so desired, thisbutterfly may also be linked with the air and fuel controls as will beunderstood by those skilled in the art.

1v. A combustible preparingf'device comprising va casing, a rotatablehollow shaft in said casing, a plurality of nested funnel-like vanessecured at the end of said vshaft and rotatable therewith, each vanehaving a flaring portion proximate to the axis of rotation and adifferquantity in the longitudinal duct so the rst radial duct onlydischarges a' part k'thereof and the 'nextradial'l duct receives' anddischarges some, and so on' for 'the 'several radial ducts as the `valveis opened lto 'maximum ow; The` atomization from the Vane or'vanes isjust as complete whether one ora-ll ofthe vanes are 'receiving fand-'discharging the oil', so the engine will function 'effectivelywhen'throttled down or when receiving maximum'fuel supply. The portionof casingli surroundingthe discharging edges of thev vanes, is somewhatlarger in diameter than adjoining portions .of the casing, therebypocketing excess' or nonfatomized. fuel. An outflow opening 15| Visprovided at, thebottom of this ent largedpart ofthe casing 'fordrainingthe accumulationxof oil therefrom to return it to the tank orotherwise'dispose ofit through Ysuitable piping.; such as yindicated at52.

Thefpart of casing 10 through which the mix ture of fuel andcQmbustionair passes after leaving the enlarged Vportion last described, turnsdownwardly and isI provided with an internal peripheral trough 53, alsoprovided with a drain opening "5'4 and suitable pipe connection., as 55to carry, the excess or condensedfuel 'back to the tanker otherwisedispose, thereof. The several drain openings and connections enableallliquied condensate .or "fuel oil tobe'dyerted vfrom entity into theengine. A tubular outlety neck n between the vanes.

ently flaring forward discharge portion more distant from said axis,each said proximate portion of ,successive vanes sloping more abruptlyfrom the axis than the preceding one and at greater angles than the,angles of slope ofthe forward discharge portions,v and the forwarddischarge portions successively projecting further from` theirrespective proximate portions than the precedingone and havingsuccessively smaller diameters of forward edges' than the preceding one.

2. A combustible preparing device comprising acasing, a rotatable hollowshaft in said casing, a plurality of' nested, funnel-like vanes securedat the end of said shaft-and rotatable therewith, each'vane `having aflaringv portion proximate to the axis of rotation and a differentlyflaringforward discharge portion more .distant from said axis, each saidproximate portion of successive vanes sloping more abruptly from theaxis and of less length than the preceding one `and vat greater anglesof slope of thelforwardfdischarge portions, and the forward dischargeportions successively projecting furtherfrom their respectivel the,other -varies forcsecuring {saidvanes together,

saidjstud having a flow passagetherein Afrom-the' hollow of' said shaft'and `with,lateral .openings GEORGE B. .oRIsR

